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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Alignment of all compounds in the training and test sets. Compound 3 was selected as the template for the alignment study, and the atoms of this compound were shown by different colors (C in white, H in cyan, and O in red).